Supercalifragilisticexpialidocious is a song written by the Sherman brothers and sung by Julie Andrews and Dick Van Dyke in the hit Disney move Mary Poppins. The word was actually found in the Oxford English Dictionary from the 1940s onward and was in the childhood vernacular of the songwriters. Supercalifragilisticexpialidocious continues to be one of the most popular long words in English and one of the most loved songs from the Mary Poppins movie.

Lyrics:
It’s Supercalifragilisticexpialidocious!
Even though the sound of it
Is something quite atrocious
If you say it loud enough
You’ll always sound precocious
Supercalifragilisticexpialidocious!
Um-dittle-ittl-um-dittle-I
Um-dittle-ittl-um-dittle-I
Um-dittle-ittl-um-dittle-I
Um-dittle-ittl-um-dittle-I

Because I was afraid to speak
When I was just a lad
Me father gave me nose a tweak
And told me I was bad
But then one day I learned a word
That saved me aching nose
The biggest word you ever heard
And this is how it goes

Oh, supercalifragilisticexpialidocious!
Even though the sound of it
Is something quite atrocious
If you say it loud enough
You’ll always sound precocious
Supercalifragilisticexpialidocious!
Um-dittle-ittl-um-dittle-I
Um-dittle-ittl-um-dittle-I
Um-dittle-ittl-um-dittle-I
Um-dittle-ittl-um-dittle-I

He traveled all around the world and everywhere he went
He’d use his word and all would say there goes a clever gent
When dukes and Maharajahs pass the time of day with me
I say my special word and then they ask me out to tea

Supercalifragilisticexpialidocious!
Even though the sound of it
Is something quite atrocious
If you say it loud enough
You’ll always sound precocious
Supercalifragilisticexpialidocious!

Um-dittle-ittl-um-dittle-I
Um-dittle-ittl-um-dittle-I

So when the cat has got your tongue
There’s no need for dismay
Just summon up this word
And then you’ve got a lot to say
But better use it carefully
Or it can change your life

For example
Yes?
One night I said it to me girl and now me girls my wife
Oh! And a lovely thing she is too. he he he